Counter molding machine



y 18,1939. c. w. an Em 2 166 888 COUNTER MOLDING MACHINE Filed April 21, 1938 L l J Patented July 18, 1939 UNITED STATES PATENT OFFICE COUNTER MOLDING MACHINE Charles W. Bailey and Jean H. Scharffenberg, Lynn, Mass, assignors to Stewart Bros. Inc., of Lynn, Lynn, Mass, a corporation of Massachusetts Application April 21, 1938, Serial No. 203,324

10 Claims.

flange of the counter and consequently has no tendency to disturb it or to deform the counter from conformity to the mold surface.

These and other features of the invention will the flange during its retracting stroke and so be best understood and appreciated from the 5 eliminate all tendency to disturb the desired following description of a preferred embodiment smooth convex curvature about the contour of thereof, selected for purposes of illustration and the counter. In one aspect, the invention comshown in the accompanying drawing, in which prises a counter molding machine having a Wiper Fig. 1 is a view in front elevation of so much lo or flange plate arranged to make its working of a counter molding machine as is necessary to stroke under full molding pressure and its return a complete understanding of the invention, stroke under conditions of released pressure. Fig. 2 is a sectional view on a larger scale show- Counter molding machines are equipped with a ing the flange plate as moving in its working center mold or plug and cooperating side molds stroke, and

if). shaped to engage the body of the blank and im- Fig. 3 is a similar View showing the flange plate 16 part a permanent curvature thereto. When these as moving in its retracting stroke. molds are closed the marginal portion of the The machine comprises a frame ID in which is counter projects beyond the face of the molds, mounted a center mold or plug H having conand a flange plate is then advanced to engage vex side walls and a flat outer face, and a pair 20 the upstanding margin of the blank and wipe it of cooperating side molds [2 which are contracted 20 forwardly and inwardly upon the face of the under molding pressures toward the center mold center mold, thus forming the horseshoe shaped i 1 after a counter blank has been inserted in the flange which is subsequently used for attaching space between them. The mechanism for opthe molded counter to the shoe bottom. In erating the side molds is not herein shown, since counter molding machines as heretofore conit forms no part of the present invention. The 25 structed the wiper or flange plate has been reouter faces of the molds II and I2 lie in a single ciprocated in both directions in a predetermined plane and in the molding operation the margin path and has exerted pressure on the flange of of the counter blank which projects outwardly the counter both in moving forwardly or downbeyond the face of these molds is wiped down- 301 Wardly over the face of the molds and in moving wardly and inwardly upon'theface of the center rearwardly or upwardly in its return stroke. In mold to form the flange of the molded counter. dealing with some types of counter stock and A pair of vertical guides l3 are secured to the under some conditions there is an objectionable frame of the machine and in these guides is tendency of the wiper plate, in its reverse stroke, movably mounted a carrier plate l4 adapted to 5 to displace the material of the counter outwardly be reciprocated vertically through the medium or away from the flat face of the center mold. of a link l5 which is pivotally secured to the front Such counters present an objectionable ridge, of the plate l4. At its upper end the link is referred to in the trade as a piazza, about the connected to the forward end of a rocker arm rear portion of the heel seat instead of conformand thus is oscillated at the proper time in the ing smoothly in a continuous curve to the concycle of the machine by a cam and driving train tour of the center mold. suggested in part but not fully illustrated in The principal object of the present invention Fig. 1. is to remedy this defect by improving the con- A wedge plate I6 having upper and lower instruction and arrangement of the flange forming clined surfaces is bolted in face to face engagef mechanism of the molding machine. As herein ment with the back of the carrier plate l4 by 45 shown and in accordance With the preferred embolts 9 and is vertically adjustable relative to the bodiment of the invention, the flange plate is carrier plate, since the bolts 9 pass through mounted to make its working stroke in a predeelongated slots in the wedge plate IS. The wedge termined path wherein it exerts full molding plate It is secured to a cap bar I! by a screw pressure upon the inturned flange of the counter I9 and the cap I! is maintained rigidly but ad- 50 and to make its return stroke under conditions justably in place by a bolt 18 tapped in the top of released pressure as, for example, by being of the carrier plate l4 and having lock nuts on displaced in a carrier or by being permitted to both sides of the cap. The cap I! overhangs the shift its position so that in its return stroke it wedge plate I6 somewhat and in the overhangu exerts, little or no pressure upon the inturned ing portion is threaded a stop bolt 20. A wiper 55.

plate 2| having upper and lower inclined surfaces on its inner face corresponding with those on the wedge plate I6 is adjustably secured to the assembly of the wedge plate I6 and carrier plate l4 by bolts 22 which operate in slots cut in the flange plate 2| and also in the Wedge plate I6.

In Fig. 2 the assembly is shown as it appears on the downward stroke, a counter blank 24 having been properly located in the mold The wedge plate I 6 is maintained in fixed position relative to the carrier plate M. The bolt 20 limits the position of the wiper plate 2|, and it will be observed that the bolts 22 are located at the bottom of the slots in the wiper plate 2|, although no pressure is exerted by them. The lower edge of the wiper plate 2| contains a recess 25 which fits over the crown of the partially molded counter 24. As the link l5 moves the assembly downward, the wiper plate 2| wipes the flange 23 of the counter 24 inwardly and downwardly until it assumes the position shown in Fig. 3. After completing its full downward stroke the wiper plate assembly is moved upwardly and returned to its initial position.

In Fig. 3 the upward stroke of the assembly is shown as nearly completed. In this movement the wiper plate 2| slides away from the mold II on the inclined surfaces of the wedge plate l6 and the upward stroke is thus effected in the absence of pressure on the counter 24.

With the structure above described, it is possible to control very accurately the length of the stroke and the pressure exerted by the wiper plate 2| upon a counter. By loosening the bolts 9 and manipulating the nuts on the bolt I8 the wedge plate is freed and may be adjusted vertically in a path limited by the extent of the slots surrounding the bolts 9 and 22. If the wedge plate I6 is moved upwardly, the effective length of the movement of the wedge plate l6 and the wiper plate 2| is shortened, i. e. with respect to the mold II and the counter 24. If the wedge plate I6 is lowered, the length of the stroke with respect to the mold II is increased. However, adjustment of the wedge plate l6 has no effect on the amount of pressure exerted by the wiper plate 2| on the counter 24. This pressure may be regulated by manipulation of the stop bolt 20. If the bolt 20 is raised, the wiper plate 2! rides upwardly and outwardly on the inclined surfaces of the wedge plate I6, thus more nearly approaching the mold H and exerting greater pressure on the counter 24. Conversely, if the bolt 26 is screwed down, the flange plate 2| is forced inwardly of the wedge plate I6, thus reducing the pressure exerted by it on the counter 24. The consequent change in the length of the movement may be compensated for by adjusting the wedge plate I6 as before described. The adjustment of the pressure and movement is determined by the nature and thickness of the material used in the counters to be molded and will be obvious to those skilled in the art of molding counters.

It will now be apparent that we have invented a molding machine which entirely obviates any danger of improper displacement of the material of the counter, since the flange is turned and formed by pressure exerted only when the flange plate is moving in the direction in which the flange is to be turned.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. A counter molding machine having molds for engaging a counter blank, fixed guides adjacent to said molds, a composite flange plate movable in said guide and being constructed and arranged to be expanded in thickness while making its flanging stroke and to be contracted while making its reverse stroke, and means for reciprocating and consequently alternately expanding and contacting said flange plate.

2. A machine for molding counters, comprising molds for shaping the body of a counter blank, a movable flange plate, and power operated mechanism for reciprocating said plate including a lost motion connection efiective in the return stroke of the plate.

3. A machine for molding counters, comprising molds for shaping the body of a counter blank, a reciprocating carrier having a wiper plate movably mounted therein, and a stop positively con necting the wiper plate to the carrier during the working stroke of the machine and arranged to disengage the wiper plate during the return stroke.

4. A machine for molding counters, comprising side and center molds, guides adjacent thereto, a carrier mounted for reciprocation in said guides and having an inclined supporting face, and a wiper plate held upon said face during the working stroke of the carrier and freed for slipping thereon during the return stroke.

5. A machine for molding counters, comprising side and center molds, fixed guides adjacent thereto, a carrier arranged to reciprocate in said guides, and a wiper plate mounted in the carrier for downward movement simultaneously with the carrier in a path determined by said guides and upwardly in a movement delayed with respect to the carrier movement and in a path uncontrolled by said guides.

6. A machine for molding counters, comprising side and center molds, fixed guides adjacent thereto, a carrier arranged to reciprocate in said guides, a wedge plate adjustably secured to said carrier, and a wiper plate mounted in the carrier and positioned by said wedge plate for downward movement simultaneously with the carrier in a path determined by said guides and upwardly in a movement delayed with respect to the carrier movement and in a path uncontrolled by said guides.

'7. A machine for molding counters comprising side and center molds, guides adjacent thereto, a carrier arranged to reciprocate in said guides, a wedge member having an inclined supporting face and being adjustably secured to said carrier, and a wiper plate held upon said inclined face during the working stroke of the carrier and freed for slipping thereon during the return stroke.

8. A machine for molding counters, comprising side and center molds, guides adjacent thereto, a carrier arranged to reciprocate in said guide, a wedge plate secured to said carrier and having an inclined supporting face, a wiper plate held upon said face during the working stroke of the carrier and freed for slipping thereon during the return stroke, means for adjusting said wedge plate to vary the eifective length of the working movement, and adjustable means for varying the pressure exerted by said wiper plate.

9. In a machine for molding counters, a carrier arranged to reciprocate, a wedge plate secured to said carrier, a wiper plate held against said wedge plate during the working stroke and freed for slipping thereon during the return stroke, means for varying the effective length of the working stroke independently of the pressure exerted by said wiper, plate, and pressure controlling means associated with said wiper plate.

10. A machine for molding counters, comprising side and center molds, guides adjacent thereto, a carrier arranged to reciprocate in said guides, a wiper plate disposed on said carrier,

means for varying the length of the movement of the wiper plate, and means for regulating the amount of pressure exerted by said wiper plate independently of its stroke.

CHARLES W. BAILEY.

JEAN H. SCI-LARFFENBERG. 

